蓝牙音箱喇叭型号：HP028-4U-0401C-A规格：φ28mmH13.5mm4Ω3W PU边新疆帽喇叭

• Size： D 28 mm H 13.5 mm
• Impedance： 4 ±20% Ω
• SPL(1W 1m sine wave) 81 ±3dB(at 800,1000.,1200,1500Hz )
• Resonance frequency 330 ±20% Hz
• Frequency Range Fo~10KHz
• Rated input power 2 W
• Maximum input power 3 W
• Buzz & Rattle must be normal (at sine wave 2.8 V)
• THD MAX 5% (RATED POWER INPUT at1000HZ）
• Operating temperature -20~+60℃
• Storage temperature -20~+60℃
• Environmental Protection Regulation RoHS